package com.itheima.reggie.Controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.Service.CategoryService;
import com.itheima.reggie.Service.DishFlavorService;
import com.itheima.reggie.Service.DishService;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    // 修改菜品
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String dish = "dish_" + dishDto.getCategoryId() + "_+1";
        redisTemplate.delete(dish);
        return R.success("修改菜品成功");
    }

    /*我们可以直接定义一个DishController的方法，声明一个Long类型的categoryId，这样做是没问题的。
    但是考虑到该方法的拓展性，我们在这里定义方法时，通过Dish这个实体来接收参数。
    在DishController中定义方法list，接收Dish类型的参数：
    在查询时，需要根据菜品分类categoryId进行查询，
    并且还要限定菜品的状态为起售状态(status为1)，然后对查询的结果进行排序。*/
    //获取映射
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        //从redis中获取指定分类下的菜品列表数据
        //获取菜单的id,获取菜单的状态;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //吧获取到的菜单的名字和菜单状态放到Redis中,进行行判断;
        List<DishDto> dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList !=null){
            return R.success(dishDtoList);
        }
        //构造获取条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //查询包装器获取菜品id,不等于null,select * from dish where dish.getCategoryId=?
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //查询条件,查询状态为1(起售状态）的菜品)
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //查询包装器顺序 按 ASC菜：：获取排序按描述订购（菜：：获取更新时间
        List<Dish> list = dishService.list(queryWrapper);
        //菜品服务列表查询包装器
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            //项目获取分类id
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品id
            Long dishid = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            ////SQL:select * from dish_flavor where dish_id = ?
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishid);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果redis不存在,查询数据库,将查询到菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList);
        //返回成功返回list
        return R.success(dishDtoList);
    }
}

